hdu2094 簡單圖論

原創 x___song 2020-06-20 15:42

http://acm.hdu.edu.cn/showproblem.php?pid=2094


求只存在一個入度爲0的點

如果存在 則Yes

如果不存在 則No


ac代碼

http://paste.ubuntu.com/8520194/

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